Marine Grade Gel Coat finish 3/4? plumbing fill lines vs comp 1/2? = faster fill Safe Spa SSB3555 Walk in tub for rotator 300x261 Walk In Tubs2? drain vs 1-1/2? = 30% faster draining Built in same quality factory as American Standard Bishops Spindle on drain know for easy opening Backup Safety Chain on drain stopper. more... See more text