Ready to take a dive into extreme anal exploration? The Hard Steel Anal Trainer Kit will help your body safety acclimate to major length and girth! Start small and work your way up to large. Hard Steel plugs are made of solid phthalate-free PVC. Each plus is tapered for comfortable insertion and is equipped with a neck to hold it in place and a firm base for anal safety. Lube them up and get ready to train! From Blush Novelties. Small length: 4″ (3.6″ insertable), girth: 1.25″. Medium length: 4.75″ (4.25″ insertable), girth: 1.5″. Large length: 6.5″ (6″ insertable), girth: 1.75″.