Surgical Instrument Catalog Supplement Aesculap Surgical Instruments. 2. 3 ... GLASSMAN NonCrushing Gastrointestinal Clamps Item No. Blade Length (in.) ... MB243R Medium x 3 mm MB244R Large 3 x 4 mm MB243R 1/1 MB244R 1/1 MB284R 1/2 BRINKERHOFF Rectal Specula Item .