Cobra Foam Replacements: Locally Crafted for Protective Cases Premium Polyurethane Foam: Balanced Flexibility and Heavy-Duty Cushioning Precision Fit for Plano Case 11842: CNC-Machined Inserts for Perfect Snugness Replacement foam inserts for Plano case 11842, featuring rounded corners for a precise fit. Set includes 2 pieces, measuring 43.00" x 14.00" x 1.75" thick, and are solid pads, not pick 'n' pluck.