A-B11678043SM-AI ROLLER-1.017IDX2One New Aftermarket Replacement Deck Roller for Simplicity and Snapper Lawn Tractors This mower deck roller (1. 017" inner diameter x 2" outer diameter) mounts to the mower deck to prevent the deck from scalping the lawn or contacting the ground over uneven terrain. It is used on Simplicity Sunstar floating decks and compatible Snapper lawn tractors and mowers. Snapper, Simplicity, and Murray are all brands under the Fits Briggs & Fits Stratton