[3SB-18: Two-sided: 9 16inch]
[3SB-20: Two-sided: 5 8inch]
[3SB-12: Two-sided: 3 8inch]
[3SB-11: Two-sided: 11 32inch]
[3SB-24: Two-sided: 3 4inch]
[3SB-09: Two-sided: 9 32inch]
[3SB-16: Two-sided: 1 2inch]
[3SB-14: Two-sided: 7 16inch]
[3SB-17: Two-sided: 17 32inch]
[3SB-08: Two-sided format: 1 4inch]
[3SB-19: Two-sided: 19 32inch]
[3SB-22: Two-sided: 11 16inch]
[3SB-10: Two-sided: 5 16inch]
Standard type hexagonal shape It is resistant to sludge even after inserting.