Package:Includes 2 pack black replacement rubber rollers spares for Cricut Joy. Materia:Our rubber rollers replacement made of TPU. Design:Our replacement rubber roller design for Cricut Joy.it is better grip on the mat than the original rubbers. Install:Roller to repair Cricut Joy, disassemble the machine it is very easy,but is fiddly in parts. Warranty:PIAOLGYI provides 30-day unconditional money back,making sure the risk-free shopping experience for you. Package:Includes 2 pack black replacement rubber rollers spares for Cricut Joy.