Casters are provided with wheel locking mechanism. This will help you better move the transport device and stabilize the device where you want to stop. Caster Size: Caster diameter: 2-7/8". Caster Stem length: 1-1/4". Package included 2 Locking Caster with 2 Caster Insert. Compatible with Genesis series (2007-2011) and Summit series gas grills (2007-2011).GENESIS CEP-310, GENESIS ESP-320, GENESIS S-310, GENESIS E-310 (2007-2010 MODELS), GENESIS E-310 (2011-2013 MODELS), GENESIS E-310 (2014 MODEL), GENESIS E-320 (2007-2010 MODELS), GENESIS S-330, GENESIS E-320 (2011-2013 MODELS), GENESIS E-330, GENESIS EP-310, GENESIS EP-320 (2007-2010 MODELS), GENESIS PREMIUM CEP-330, GENESIS EP-320 (2011-2013 MODELS), GENESIS EP-330,GENESIS CEP-320, GENESIS CEP-330, GENESIS ESP-310, GENESIS S-310 (2007 MODEL) The product fits 310 LP (2007), 320 (2009), S-420 (2007), E-420 (2007), 670 (2010), Also for Spirit 200 Series, for Genesis 300 Series, for Summit E400 / E600, (Note: Not fit on Genesis and Summit models made 2012 and after) Compatible with Spirit series: GENESIS SPIRIT E-210, GENESIS SPIRIT E-310, GENESIS S-320, GENESIS SPIRIT EP-320, GENESIS S-320 (2007 MODEL), SPIRIT SP-310, SPIRIT SP-320, SPIRIT E-210, SPIRIT E-310, SPIRIT E-320, GENESIS SPIRIT E-320, GENESIS SPIRIT EP-310, GENESIS SPIRIT S-320,SPIRIT EP-310, SPIRIT EP-320, SPIRIT S-320 (2009 & OLDER), Compatible with Summit series gas grills: SUMMIT S-420, SUMMIT E-420, SUMMIT E-450, SUMMIT S-450, SUMMIT S-460, SUMMIT S-470, SUMMIT S-620, SUMMIT S-650, SUMMIT S-670, SUMMIT S-660, SUMMIT E-470, SUMMIT E-620, SUMMIT E-650, SUMMIT E-670 Replace for 83841301 97120001, 97121001, 77160001, 77170001, 77171001, 77260001, 77270001, 77271001, 6570001, 6611001, 6611301, 6615701, 77360001, 96511049, 97170001, 7471001, 77460001, 77470001, 77471001, 86511701, 86519099, 4420201, 4420301, 4421001, 4421301, 4421411, 6511001, 6511049, 86570001, 86611001, 77370001, 77371001, 1710001, 1711001, 1740001, 7360001, 7370001, 7371001, 7420001, 7460001, 7470001, 93750201, 93751001, 93751301, 93751701, 86511001, 86511301, 6535301, 6535701, 6536301, 6536701, 1741001, 1741301, 1742001, 1750001, 93841701, 83841001, 83841701, 83849399, 83851001, 83851301, 86611301, 6511301, 6511701, 6512001, 1881301 Replace for 6631001, 6631301, 1740301, 97270001, 97271001, 97320001, 97321001, 97370001, 83740101, 3851001, 3851301, 3851701, 3870001, 3880001, 6531301, 6531701, 6534301, 93850101, 93851001, 93851301, 93851701, 1751001, 1780001, 2740001, 2740301, 2780001, 1841001, 1841301, 1850001, 6621001, 6621301, 6611701, 6619099, 6619399 Caster diameter 2-7/8"