The 138190033 Square Tip Rocker Arms come in a pack of two for the 196 clone engines. 

There are two style rocker arms: square tip and round tip. The square style becomes more prominent due to the stabilization over the round style rockers. It is not uncommon for the rocker arms to not be a true 1:1 ratio some times; they can be 1:1.05, 1:1.1, etc. This is important because it will change the running lift if it's checking for legality. Most rules allow grinding to make it a 1:1 ratio or compliment your cam for the maximum allowed running lift to fix this problem. 

These stainless steel pushrods are the OEM Replacement for 196cc 6.5hp GX200 Clones, including the Tillotson 196R/RS, Ducar 196, and Box Stock 196. These also fit the Predator 212 Non-Hemi Cylinder Heads. 

AKRA 2020 Rules for Rocker Arms

Factory stock rocker arms 1:1 ratio and pushrods only. The minimum overall length of the rocker arm 2.145". Minimum thickness of the upper valve stem end of the rocker arm .030" The surface finish of the rocker arm's contact area to valve only, non-tech, adjusts for proper running lift. Square tip rockers allowed. 

NKA 2020 Rules for Rocker Arms

40.4.20.3: Rocker Arms:

40.4.20.3.1: 1:1 ratio rocker arms only. 

40.4.20.3.2: Rocker arms must be steel and are subject to magnetic tests. 

40.4.20.3.3: Rocker arms are allowed to be ground on valve stem location only or on the rocker arm's bottom to allow the running lift to be compliant. Grinding on the sides of the rocker arm is prohibited ЕҐno minimum thickness checks.