SAPL 204-12 IPTCI 3/4" Bore Standard Pillow Blocks with Cast Iron Housing. Narrow Inner Race Bearing With Eccentric Locking Collar. K-Type Seal. IPTCI's Standard cast housings are among the most rigidly...SAPL 204-12 IPTCI 3/4" Bore Standard Pillow Blocks with Cast Iron Housing. Narrow Inner Race Bearing With Eccentric Locking Collar. K-Type Seal. IPTCI's Standard cast housings are among the most rigidly...