Inner Ring Dimensions - Weight NPS 150# 300# 600# 1/2" 1 Oz. 1-1/2 Oz. 1-1/2 Oz. 3/4" 1-1/2" Oz. 2-1/2 Oz. 2-1/2 Oz. 1" 2 Oz. 2-1/2 Oz. 2-1/2 Oz. 1-1/4" 2 Oz. 3 Oz. 3 Oz. 1-1/2" 2-1/2 Oz. 4 Oz. 4 Oz. 2" 3-1/2 Oz. 4-1/2 Oz. 4-1/2 Oz. 2-1/2" 5-1/2 Oz. 6-1/2 Oz. 6-1/2 Oz. 3" 6 Oz. 7 Oz. 7 Oz. 4" 8-1/2 Oz. 9-1/2 Oz. 14 Oz. 5" 9-1/4 Oz. 12 Oz. 1 Lb. 6" 10 Oz. 1 Lb. 1-1/2 Lb. 8" 1 Lb. 1-1/2 Lb. 2 Lb. 10" 1-1/4 Lb. 1-3/4 Lb. 3-1/8 Lb. 12" 1-1/2 Lb. 2-1/4 Lb. 4-1/4 Lb. 14" 2-1/4 Lb. 3-1/2 Lb. 4-1/2 Lb. 16" 2-1/2 Lb. 4-1/4 Lb. 5 Lb. 18" 2-3/4 Lb. 5 Lb. 6 Lb. 20" 3-1/2 Lb. 6 Lb. 7-1/2 Lb. 22" 3-3/4 Lb. 6-3/4 Lb. 8-1/4 Lb. 24" 3-3/4 Lb. 7-1/2 Lb. 9 Lb. 30" 6-1/2 Lb. 10-1/2 Lb. 12 Lb. 36" 8-1/2 Lb. 12-1/2 Lb. 15-1/2 Lb. 42" 10-1/2 Lb. 14-1/2 Lb. 17 Lb. 48" 12-1/2 Lb. 16-1/2 Lb. 19 Lb.